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WO1998012769A1 - Structure a couches epaisses destinee a la transposition en quadrature des signaux rf - Google Patents

Structure a couches epaisses destinee a la transposition en quadrature des signaux rf Download PDF

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Publication number
WO1998012769A1
WO1998012769A1 PCT/US1997/016417 US9716417W WO9812769A1 WO 1998012769 A1 WO1998012769 A1 WO 1998012769A1 US 9716417 W US9716417 W US 9716417W WO 9812769 A1 WO9812769 A1 WO 9812769A1
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WO
WIPO (PCT)
Prior art keywords
trace
cell
metal
transmission line
metal trace
Prior art date
Application number
PCT/US1997/016417
Other languages
English (en)
Inventor
Loren E. Ralph
Original Assignee
Rf Prime Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rf Prime Corporation filed Critical Rf Prime Corporation
Priority to EP97943331A priority Critical patent/EP0927434B1/fr
Priority to JP51482298A priority patent/JP3262173B2/ja
Priority to AU44827/97A priority patent/AU4482797A/en
Priority to CA002265810A priority patent/CA2265810A1/fr
Priority to DE69709878T priority patent/DE69709878T2/de
Publication of WO1998012769A1 publication Critical patent/WO1998012769A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
    • H01P5/187—Broadside coupled lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/0006—Printed inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • H01P3/081—Microstriplines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/18—Waveguides; Transmission lines of the waveguide type built-up from several layers to increase operating surface, i.e. alternately conductive and dielectric layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
    • H03D9/06—Transference of modulation using distributed inductance and capacitance
    • H03D9/0608—Transference of modulation using distributed inductance and capacitance by means of diodes
    • H03D9/0633—Transference of modulation using distributed inductance and capacitance by means of diodes mounted on a stripline circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/14—Balanced arrangements
    • H03D7/1408—Balanced arrangements with diodes

Definitions

  • This invention pertains generally to passive microwave structures using a thick film construction, and more particularly to a thick film construct and quadrature coupler for the fabrication of devices such as IQ modulators, IQ demodulators, vector modulators, image reject mixers, and multi-channel mixers.
  • Devices providing for quadrature modulation or vector modulation are typically constructed using a combination of two matched frequency translation devices ("mixers”), a coupler device (“quadrature coupler”) consisting of one input port and two output ports exhibiting an output level equal to one-half the input port power with a phase differential between the two output ports of ninety degrees, and a zero phase difference power divider/summer.
  • Mixers matched frequency translation devices
  • quadrature coupler a coupler device
  • These devices can be fabricated using many different constructs.
  • lower frequency devices ⁇ 2Ghz
  • fernte cores and bifilar wire to create the quadrature hyb ⁇ d
  • mixer baluns mixer baluns
  • power splitters are typically hand wound due to their size and complexity, and cannot be assembled in a automated fashion.
  • higher frequency devices are typically assembled using some type of soft board mate ⁇ al, such as PTFE soft board.
  • structures built using this technology tend to be large in size, and often require a certain level of hand
  • quadrature devices are used in the construction of microwave IQ modulators, IQ demodulators, vector modulators, image reject mixers, and multi-channel mixers, there is need for a construct for such devices which is low in cost, repeatable to manufacture, and compatible with commonly used surface mount assembly techniques
  • the present invention satisfies that need, as well as others, and overcomes the deficiencies found in the previously developed devices.
  • the present invention pertains generally to quadrature coupler devices and more particularly to a thick film construct and quadrature coupler for use in fab ⁇ catmg devices such as IQ modulators, IQ demodulators, vector modulators, image reject mixers, and multi-channel mixers
  • a thick film construct in accordance with the present invention comprises a dielectric substrate base with a metallized backside, a first metal trace deposited on the non-metallized side of the substrate base, a dielectric layer deposited over and around the first metal trace, and a second metal trace deposited on the dielectric layer
  • the first and second metal traces are aligned over their widths and lengths so to form a balanced transmission line structure where the first and second metal traces represent top and bottom lines in the balanced structure.
  • This thick film structure serves as the foundation for microwave capacitors, mixers, and other transmission line based structures, including a quadrature coupler.
  • the quadrature coupler in turn forms the basis for more complex devices such as mixers, modulators, demodulators and the like.
  • the substrate base did not have a metallized backside
  • the thickness of the dielectric was 0.0026 inches nominal
  • the dielectric constant was in the range of approximately 6 to 10.
  • a backside groundplane has been added to the substrate base.
  • the dielectric constant of the present invention has been lowered to a range of approximately 2 to 6 since the line widths of the prior structure were already near the minimum fabrication tolerances for thick film construction.
  • a quadrature coupler in accordance with the present invention comprises a four port device, with an input port, an isolated port, in-phase output port (I-port), and quadrature phase output port (Q-port).
  • the device is symmetrical about a center line, with dielectric "vias" interconnecting opposite top and bottom lines where dictated by the circuit. This crossover functions to equalize the phase velocity of the top and bottom lines, creating a flatter response versus frequency for the quadrature phase characteristics. Coupled elements connected to the center of the structure create capacitor elements to ground for both top lines.
  • This configuration creates a phase adjustment that centers the performance of the quadrature coupler and provides compensation to variations in fabrication, since the capacitors are manufactured using the same dielectric material and contribute a coupling adjustment that is inverse to that of the main coupled structure with variations in dielectric thickness.
  • quadrature coupler performance is the most critical element of a quadrature based device
  • fabrication of the quadrature coupler dictates the fabrication for the entire device
  • Optimum performance is achieved by, but not limited to, using a base substrate of alumina 96 mate ⁇ al To simply construction, all devices employing the quadrature coupler
  • a mixer accordance with the present invention follows the topology of the mixer desc ⁇ bed in U.S Patent No. 5,534,830, with the addition of a diplexer element at the I-port connection, and the optional inclusion of a low pass filter at the intermediate
  • a modulator in accordance with the present invention comp ⁇ ses the quadrature coupler and two mixers, with the outputs of the two mixers feeding an in-phase (zero phase difference) power combiner
  • the in-phase power combiner is constructed by one of two
  • part of the design implementation incorporates a high degree of symmetry within the structure This improves the balance of the ground currents in the device, improving the overall performance
  • An object of the invention is to provide for a class of quadrature devices using thick film multi-layer technology
  • Another object of the invention is to provide for automated device assembly
  • Another object of the invention is to provide for surface mount attachment of quadrature devices
  • Another object of the invention is to provide for repeatable and predictable device performance .
  • said assemblies are constructed in a manner such that the
  • FIG. 1 is a diagrammatic perspective view of balanced transmission line cell in accordance with the present invention.
  • FIG. 2 is a cross-sectional view of the apparatus shown in FIG. 1 taken through line
  • FIG. 3 is a schematic diagram of a quadrature coupler employing transmission line cell elements shown in FIG. 1.
  • FIG. 4 is a diagrammatic perspective view of a quadrature coupler corresponding to the schematic diagram shown in FIG. 3.
  • FIG. 5 is a top plan view of the quadrature coupler shown in FIG. 4.
  • FIG. 6 is a schematic diagram of a mixer employing transmission line cell elements shown in FIG. 1.
  • FIG. 7 is a schematic diagram of a modulator/demodulator employing the quadrature coupler shown in FIG. 3 and the mixer shown in FIG. 6 with a resistive power divider/combiner.
  • FIG. 8 is a schematic diagram of an alternative embodiment of the modulator/demodulator shown in FIG. 7 employing a balanced line power splitter/combiner.
  • FIG. 9 is a top plan view of a modulator/demodulator according to FIG. 7 showing lines of symmetry between circuit elements. DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • FIG. 1 and FIG. 2 for illustrative purposes the present invention is embodied in the apparatus generally shown in FIG. 1 and FIG. 2, as well as various microwave devices fabricated therefrom, examples of which are shown in FIG. 3 through FIG. 9. It will be appreciated that the apparatus may vary as to configuration and as to details of the parts without departing from the basic concepts as disclosed herein.
  • a balanced transmission line cell 10 in accordance with the present invention is formed on a substrate base 12 which serves as a support structure.
  • Substrate base 12 is typically fabricated from a high alumina content ceramic material, such as 96% alumina or the like.
  • the thickness of substrate base 12 is preferably approximately 0.025 inches but could be as thick as approximately 0.030 inches in thickness, depending on the lead frame used and overall package height.
  • a gold paste approximately 8 microns to approximately 12 microns thick and having a width W is deposited on top of substrate base 12 to form a first continuous metal trace 14.
  • Gold is preferred since it is a low loss material at microwave frequencies, has fine deposition resolution, and is compatible with wire bond operations.
  • Width W is typically in the range of approximately 0.006 inches to approximately 0.010 inches. However, when cell 10 is implemented as a capacitor, the width of first metal trace 14 can be a wide as 0.020 inches depending upon the capacitance desired..
  • a dielectric layer 16 is deposited over and around first metal trace 14 by multiple print and fires of the dielectric material until a uniform layer with a consistent thickness is created.
  • dielectric layer 16 will have a dielectric constant of 4.5 for optimal performance, but can range from approximately two to six. Further, the thickness of dielectric layer 16 should be in the range of approximately 0.001 inches to approximately 0.002 inches and, preferably, the thickness is nominally 0.0016 inches for optimum coupler performance. This thickness provides an odd mode line impedance of approximately 20 ohms with line widths of approximately 0.006 inches as required by a nominal 50 ohm quadrature coupler. A second continuous metal trace 18 of gold is deposited on top of dielectric layer
  • first metal trace 14 in the same manner as first metal trace 14, and having the same nominal thickness as first metal trace 14. While the width W of second metal trace 18 can be the same as first metal trace 14, the bandwidth of the cell can be optimized by making the width of second metal trace 18 less than that of first metal trace 14. The typical range for W' would be approximately 0.005 inches to 0.008 inches where W ranges from approximately 0.006 inches to 0.010 inches. The slight difference in line widths will optimize bandwidth by equalizing the differences between the dielectric constant of air around the exposed surface of second metal trace 18 and the dielectric constant of dielectric layer 16 and substrate base 12 that surround first metal trace 14.
  • Second metal trace 18 is positioned such that it is generally aligned with and generally parallel to first metal trace 14 over the length and widths of the traces, and such that the ends of the traces are aligned. This maintains a balanced transmission line structure. It will be appreciated, however, that in fabrication of devices employing the transmission line cell of the invention, the metal traces may be extended for purposes of electrical connections or device packaging. In such cases, the physical ends of the traces will extend beyond what is considered to be the balanced transmission line, but the ends of the traces will still be aligned for purposes of the balanced transmission line.
  • a metal backplane layer 20 having a thickness of approximately 0.0006 inches to approximately 0.0012 inches covers the entire bottom area of substrate base 12 to form a ground plane element for the purpose of controlling the even mode impedance of first and second metal traces, 14, 18.
  • the shunt capacitance created by this element sets the even mode impedance to approximately 120 ohms, which is the impedance required for a 3 dB quadrature coupler.
  • the phase velocity in the even mode is approximately equal to the odd mode, thus improving bandwidth.
  • the length L of the transmission line formed by first and second metal traces 14, 18 determines the frequency of operation, and is preferably selected to be approximately one- eighth of the desired wavelength for coupler operation, and approximately one-quarter of the desired wavelength for optimum mixer performance.
  • the transmission line has an odd mode impedance which is determined by the widths of first and second metal traces 14, 18 and the thickness of dielectric 16, and has an even mode impedance that is established by metal backplane layer 20 and is a function of the widths of first and second metal traces 14, 18.
  • Cell 10 includes two ports 22a, 22b on first metal trace 14 and two ports 24a, 24b on second metal trace 18, that can be connected in various configurations.
  • a quadrature coupler 26 employing four transmission line cells 10 in accordance with the present invention is shown.
  • Cells 28, 30, 32 and 34 represent the four cells of such a device.
  • the first set of cells 28, 30 establish the four port device, with an input port 36, an isolated port 38, and in-phase output port (I-port) 40 and a quadrature phase output port (Q- port) 42.
  • Isolated port 38 is terminated to ground using a 50 ohm resistor 44 to match the 50 ohm device impedance.
  • the lower and upper traces 14, 18 of these cells typically have widths of approximately 0.006 inches to 0.008 inches, giving the desired odd and even mode impedances of approximately 20 ohms and 120 ohms respectfully.
  • the second set of cells 46, 48 act as capacitors to ground to provide for bandwidth selection and phase response of the quadrature coupler; that is, to open and close the "Eye- function" which changes the overall bandwidth of the coupler.
  • the capacitance values are chosen in a conventional manner for amplitude balance vs. bandwidth.
  • the upper traces 18 of these capacitors typically have the same widths as the upper traces 18 of cells 28, 30 (e.g., 0.006 inches to 0.008 inches) while the lower traces 14 typically have widths ranging from 0.008 inches to 0.020 inches depending upon the desired characteristics. Trace lengths are chosen in a conventional manner based on their widths and the desired capacitance value.
  • Input port 26 is connected to one end of the bottom trace 50 of cell 28 and in-phase output port 36 is connected to the corresponding end of top trace 52 of that same cell.
  • the opposite end of bottom trace 50 of cell 28 is connected to one end of the top trace 54 of cell 30 and the opposite end of top trace 52 of cell 28 is connected to the corresponding end of bottom trace 56 of cell 30.
  • the opposite end of bottom trace 56 of cell 30 is connected to isolated port 38 and termination resistor 44 is connected from isolated port 38 to ground.
  • the opposite end of top trace 54 is connected to quadrature phase output port 42.
  • top trace 58 of cell 46 is connected to the connection between top trace 52 of cell 28 and bottom trace 56 of cell 30. The opposite end of top trace 58 as well as both ends of bottom trace 60 of cell 46 are left unconnected. However, bottom trace 60 of cell 46 is connected to ground at its approximate midpoint.
  • one end of the top trace 62 of cell 48 is connected to the connection between bottom trace 50 of cell 28 and top trace 54 of cell 30 The opposite end of top trace 62 as well as both ends of bottom trace 64 of cell 48 are left unconnected. However, bottom trace 64 of cell 48 is connected to ground at its approximate midpoint. Cells 46, 48 thus form shunt capacitors
  • a metallized "via" hole 66 through dielectric layer 16 provides the elect ⁇ cal connection between top trace 52 of cell 28 and bottom trace 56 of cell 30
  • a metallized via hole 68 through dielect ⁇ c layer 16 provides the elect ⁇ cal connection between bottom trace 50 of cell 38 and top trace 54 of cell 30
  • bottom trace 60 of cell 46 is elect ⁇ cally connected to backplane layer 20 with a metallized via hole 70 through substrate base 12
  • bottom trace 64 of cell 48 is elect ⁇ cally connected to backplane layer 20 with a metallized via hole 72 through substrate base 12
  • Metallized via holes 74, 76 are used to connect top traces 52, 54 to m-phase output port 40 and quadrature phase output port 42, respectively
  • top traces 58, 62 of cells 46, 48 are contiguous and common among all of the cells. This is the preferred method of fab ⁇ cation rather than connecting four physically separate cells It also permits top traces 58, 62 of cells 46, 48 to be p ⁇ nted as continuous extensions of top traces 52, 54 of cells 28, 30 so that separate elect ⁇ cal connections are not required.
  • quadrature coupler 26 employs incorporates a high degree of symmetry within the structure.
  • the interconnected ends of cells 28, 30 are positioned opposite each other, wherein the cells each have a longitudinal axis extending between their ends and the longitudinal axes are aligned so as to form a common longitudinal axis
  • a lateral axis B passes between the ends of the interconnected traces such that lateral axis B is perpendicular to common longitudinal axis A and passes through the centers of via holes 70, 72.
  • Cells 28, 20 are thusly symmet ⁇ cal about lateral axis B.
  • Cells 46, 48 are symmet ⁇ cal about axis A This symmetry improves the balance of the ground currents in the device, thereby improving the overall performance of the device.
  • a plurality of cells 10 in accordance with the present invention can be used to construct a mixer 74 as shown.
  • Mixer 74 has the same topology as the mixer described in U.S. Patent No. 5,534,830, with the addition of a diplexer element 76 at the I-port connection 78, and the optional inclusion of a cell 80 configured as a shunt capacitor at the IF port 82.
  • Diplexer 76 comprises a capacitor 84 in series with a termination resistor 86 connected to ground.
  • Termination resistor 86 can be a conventional thick film resistor connected to ground using a metallized via to the backside ground metal.
  • Diplexer 76 serves the purpose of reducing the amount of local oscillator leakage (LO) at both the I- port connection 78 and the RF port 88 by terminating higher order products exiting IF port 82 rather than reflecting those products back into the mixer.
  • Capacitor 80 works in combination with transmission line 90, which can be the bottom trace of a cell, to form a low pass filter network that reduces leakage from the IF port 82.
  • mixer 74 uses the topology described in U.S. Patent No.
  • Cell 92 includes a top trace 94, one end of which is connected to LO port 96. The corresponding end of bottom trace 98 is connected to ground. The opposite output ends of top and bottom traces 94, 98 are connected to input ends of bottom traces 100, 102 of cells 104, 106, respectively. The opposite ends of bottom traces 100, 102 are connected to ground. Top traces 108, 110 of cells 104, 106 are tied together and their input ends and coupled to IF port 82 through transmission line 90. The opposite output ends of top traces
  • Cells 104, 106 comprise a pair of inverting transmission line structures, coupling the balanced output from cell 92 to diode quad 108.
  • top trace 114 of cell 116 connected to RF port 88.
  • the corresponding end of bottom conductor 118 of that cell is connected to ground.
  • the opposite input ends of top and bottom traces 114, 118 are connected to diode bridge 112 as shown.
  • a single transmission line 120 which can be a bottom trace of a cell, is shunted to ground across the connection between top trace 1 14 and diode bridge 112.
  • the two ground returns provided by transmission line 120 and bottom trace 118 of cell 1 16 provide for improved ground return balance for cell 116, as well as the required direct current return path connection for the IF frequency during the conversion process.
  • a balun is thus formed that keeps the phase velocity equal.
  • Capacitor 84 comprises a cell wherein the input end of top trace 122 is connected to the input ends of top traces 108, 110, and the opposite end is left unconnected. The corresponding input end of bottom trace 124 is also left unconnected while the output end is shunted to ground through termination resistor 86.
  • Capacitor 80 comprises a cell wherein the input end of top trace 126 is connected to IF port 82 and the opposite end is left unconnected. The corresponding input end of bottom trace 128 is also left unconnected while the output end is shunted to ground. Referring now to FIG. 7, a modulator/demodulator can be fabricated by combining a quadrature coupler as shown FIG. 3 with two of the mixers shown in FIG.
  • FIG. 8 Another example of a modulator/demodulator having a similar configuration is shown in FIG. 8, except that two way, zero degree, power splitter/combiner as described in U.S. Patent No. 5,534,830 is used instead of a resistive power splitter/combiner.
  • a high level signal supplied to quadrature coupler 26 at input port 36 is split and applied to two mixers 74a, 74b.
  • each mixer is driven by low level signals equal in amplitude, and 90 degrees out of phase.
  • the resulting signals are presented to the dual inputs of power splitter/combiner 130, with desired signals combining, and undesired signals ideally canceling, with resulting composite signal exiting at RF port 132.
  • the same configuration can be used as a demodulator by reversing the inputs and outputs.
  • FIG. 9 which represents a top plan view of the modulator/demodulator shown schematically in FIG. 7, the elements are arranged in symmetncal fashions about the indicated center lines A, B and C shown.
  • This symmetry which is not achievable except with the cells in accordance with the present invention, provides a number of advantages.
  • the center feed point provides for equidistant ground returns for both mixers, as well as the I and Q mixer ports.
  • the symmet ⁇ cal feeds from the RF side of the mixers to the diodes improves isolation from the LO side to the RF side of the mixers.
  • the symmet ⁇ cal diode locations ease assembly across modulator cells in a thick film array.
  • this invention provides a balanced transmission line cell and quadrature coupler construct which can be used in the construction of microwave IQ modulators, IQ demodulators, vector modulators, image reject mixers, and multi-channel mixers.
  • the thin lines used in the present invention which are approximately 80% less width than in conventional p ⁇ nted balanced line structures, allow for maximum component densities by meande ⁇ ng the lines on the substrate, resulting in reduction of the overall size of the microwave device being fabricated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Waveguides (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Amplitude Modulation (AREA)

Abstract

Structure à couches épaisses et coupleur en quadrature utilisés pour fabriquer des dispositifs tels que des modulateurs IQ, des démodulateurs IQ, des modulateurs de vecteurs, des mélangeurs de rejet d'image et des mélangeurs multivoie. La structure à couches épaisses comprend une base de substrat diélectrique munie d'un côté arrière métallisé; un premier ruban de métal est déposé sur le côté non métallisé de la base du substrat. Une couche de diélectrique est déposée par-dessus et autour du premier ruban de métal; un deuxième ruban de métal est déposé sur la couche de diélectrique. Les premier et deuxième rubans de métal sont alignés suivant leur largeur et leur longueur de manière à former une structure de ligne de transmission équilibrée où le premier et le deuxième rubans de métal représentent les lignes supérieure et inférieure de ladite structure équilibrée. Cette structure à couches épaisses sert de socle aux condensateurs hyperfréquence, aux mélangeurs et à d'autres structures à base de lignes de transmission, y compris les coupleurs en quadrature. Le coupleur en quadrature qui, à son tour, sert de base à des dispositifs plus complexes, inclut un port d'entrée, un port isolé, un port de sortie en phase (port I) et un port de sortie en phase en quadrature (port Q).
PCT/US1997/016417 1996-09-17 1997-09-17 Structure a couches epaisses destinee a la transposition en quadrature des signaux rf WO1998012769A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP97943331A EP0927434B1 (fr) 1996-09-17 1997-09-17 Structure a couches epaisses destinee a la transposition en quadrature des signaux rf
JP51482298A JP3262173B2 (ja) 1996-09-17 1997-09-17 Ｒｆ信号の直角変換のための厚膜構成物
AU44827/97A AU4482797A (en) 1996-09-17 1997-09-17 Thick film construct for quadrature translation of rf signals
CA002265810A CA2265810A1 (fr) 1996-09-17 1997-09-17 Structure a couches epaisses destinee a la transposition en quadrature des signaux rf
DE69709878T DE69709878T2 (de) 1996-09-17 1997-09-17 Dickschichtkonstrukt zur quadraturumsetzung von rf-signalen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/718,084 1996-09-17
US08/718,084 US5745017A (en) 1995-01-03 1996-09-17 Thick film construct for quadrature translation of RF signals

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WO1998012769A1 true WO1998012769A1 (fr) 1998-03-26

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US (1) US5745017A (fr)
EP (1) EP0927434B1 (fr)
JP (1) JP3262173B2 (fr)
KR (1) KR20000036223A (fr)
AU (1) AU4482797A (fr)
CA (1) CA2265810A1 (fr)
DE (1) DE69709878T2 (fr)
WO (1) WO1998012769A1 (fr)

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WO2003047024A1 (fr) * 2001-11-30 2003-06-05 Telefonaktiebolaget Lm Ericsson (Publ) Coupleur directif
GB2384370A (en) * 2001-10-31 2003-07-23 Agilent Technologies Inc Directional coupler
WO2003071628A1 (fr) * 2002-02-19 2003-08-28 Raytheon Company Dispositif servant a diriger l'energie et son procede de fabrication
GB2432462A (en) * 2005-11-17 2007-05-23 Werlatone Inc Multi-section coupler assembly with various connection configurations

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Publication number Priority date Publication date Assignee Title
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DE69709878T2 (de) 2002-08-29
CA2265810A1 (fr) 1998-03-26
US5745017A (en) 1998-04-28
AU4482797A (en) 1998-04-14
EP0927434B1 (fr) 2002-01-02
KR20000036223A (ko) 2000-06-26
DE69709878D1 (de) 2002-02-28
EP0927434A1 (fr) 1999-07-07
JP3262173B2 (ja) 2002-03-04

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